Luna, known colloquially as the Moon, is Earth's only natural satellite. It was the first extraterrestrial location to be colonised by mankind.[1] The United Americas and other governments and corporations now operate multiple colonies on Luna. The United Americas founded two main settlements: Plymouth and Olympia. Weyland-Yutani also had major headquarters in the Sea of Tranquillity region.[2]

The Moon was the setting of Moon, a 2009 film which pays homage to films of director Duncan Jones' youth, which includes Alien.[3] "Welcome to Lunar Industries", a track from the film's soundtrack, was later used in the Aliens: Colonial Marines trailer "Contact".